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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 7936 |
| 4 | 2296 |
| 5 | 412672 |
| 6 | 65536 |
| 7 | 8777216 |
| 8 | 1085468 |
| 9 | 117516288 |
| 10 | 12320768 |
| 11 | 1168488704 |
| 12 | 109365184 |
| 13 | 9394478080 |
| 14 | 806748160 |
| 15 | 64249840128 |
| 16 | 5156716678 |
| 17 | 386395015168 |
| 18 | 29347020800 |
| 19 | 2091202273536 |
| 20 | 151675552480 |
| 21 | 10358666717184 |
| 22 | 722376130560 |
| 23 | 47567642539520 |
[1,0,0,7936,2296,412672,65536,8777216,1085468, 117516288,12320768,1168488704,109365184, 9394478080,806748160,64249840128,5156716678, 386395015168,29347020800,2091202273536, 151675552480,10358666717184,722376130560, 47567642539520] |